Electrically-driven can-tester.



Ga UUWN'ING. BLECTRIOALLY DRIVEN CAN TESTER.

v APPLICATION FILED MAR. 29, 1911. I 1,9?387. Patented Sept.9,1918.

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Patented. Sept. 9, 1913.

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O. DOWNING.

ELEUTRIGALLY DRIVEN CAN TESTER.

APPLICATION FILED MAR. 25, 1911.

Patented Sept. 9, 1913.

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@555: mwwig G. DOWNING. ELEGTRIGALLY DRIVEN CAN TESTER.

APPLICATION FILED MAR. 29, 1911.

Patented Sept.9,1913.

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APPLICATION FILED MAR. 29, 1911.

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O. DOWNING. BLEGTRIGALLY DRIVEN GAN TESTER.

I APPLICATION FILED MAR. 29, 1911. Sept. 9,

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OHARLES DOWNING, OF CHICAGO, ILLINOIS, ASSIGNOR 'IO AMERICAN CAN COMPANY, OF NEW YORK,'N. Y., A CORPORATION OF NEW JERSEY.

ELECTRICALLY-DRIVEN CAN-TESTER.

Specification of Letters Patent.

Patented Sept. 9, 1 91-3.

Application filed March 29, 1311. Serial No. 617,568.

Tllinois, have invented a new and useful Improvement in Electrically-Driven Can-Testers,'.of w uch the following is a specification. This invention relates to improvements I in electrically-operatedean-testers, and consists in the means employed for connecting an electric motor with the gearing of the machine, and in the means employed for reversing the application if the current to said motor, as will be more fully understood from the subjoined specification and claims, and the accompanying drawings, which form spurt of this specification.

In said drawing, Fig. l is a front elevation of the improved electrically-operatedcan-testing machine embodying the invcntion;Fig.2 aplan View of the same; Fig. 3 a side elevation; Fig. 4 a section on the line 44 of Fig. 1; Fig. 5 a detail partial view of the lever connections shown in Fig. 1; Fig. 6 a section on the line 6-6 of Fig. 4, being, however, upon a somewhat larger scale; Fig.7 a section of-the can holding 'mechanism taken on the line 7-7 of Fig.

1; Fig. 8 a section on the line, 8-8, of Fig. 7; Fig. 911 section on the line 9-9 of Fig. 7; Fig. 10 a section on the line 10-10 of Fig. 7 and Fi 11 a side elevation of the machine illustrating a modification of the driving gear connecting the motor with the can carriage.

In said drawing, 2t is the tank-n22 the cans to be submerged and tested mlounted in the carriage 23; 24,24 are vertical pds attached to the can carriage and sli ing. in the tubular guides These rods, 24 may be furnished at their lower parLw'ith the racks, 26, 26, to mesh with pinions 27, 27, on the shaft, This shaft, 28, carries the worm wheel, 29, engaging with the worm, 30, on the motor shaft 31. At each end of the carriage is pivoted a pitman rod, 32, connected to a counter-balance-lever, 33, carrying the weight 34. These weights, 34, counter-balance the carriage and facilitate its. movement up and down by the power. In the modification shown at Fig. ll the rack bars, 26, are omitted from the guide rods, 24, and a segn'tental worm gear, 291, substituted for the worm gear, .29, on the shaft 28; And in this modification the counter-balance lever 33 instead of being mounted u on its own fulcrum, is connected to the she t 28, and the power of the shaft 28in said modification is applied to lift and lower the carriage through the counter-balance pitman, 32, as will be readily understood from the drawing. Projecting from the carriage, 23, is an arm, 35, to which is attached the vertical rod, 36, which moves up and down with the carriage and is provided with the upper stop or collar 37 and. the lower stop or collar 38. A motor, 39, is mounted to drive the shaft 31.

40 is a common form of band brake, operated by means of the lever 41 to stop the motor. The lever 41 is carried between the jaws 42 ofthe brake and the outer end of said lever is lifted or lowered by the spring suspended arm 43, made forked and titled with adjusting screws, 44, to permit a certttin amount of play. The spring, 45, connected from this lever to the stationary trade of the machine servesdo keep the for ed lever norm'ally raised. This forked lever 43 being connected to the shaft 46, and

48 to the treadle, 49, the spring 45 rrnn srairns rarizncr OFFICE.

linl matitainsthe treadle 49 in the lifted positiml. and the shaft, 46, in a normal position. Attached to the shaft 46, is an arm, 50, connected by a link, 51, to the bell-crank, 52, the other end of which bell-crank is con nected to the switch-stem, 53, by a pin, 54,

in the slot 55 in said stem. The upper endof the switch-stem is shown to be cylindric and passes through a guide 56, into the in terior of the switch box 57, and at its upper end enters a second puide 58. Spkings, 59, 60, tend to float or keep this switch stem in the position shown at Fig. 6, but lenve it tree to be moved up or down. On' the'stem, within the box, and. floated on the s rin s 61, 61, are two electrical contact dis s, 6%, G3, and arranged in conjunction with these disks, in opposition, are the up terminals 65 65, and the down terminals, 64, 64. \Vlien the contact disks stand in the position indicated in Fig. 6, there will be no. current on the motor and the machine will he at a standstill. 'When the two contact disks 62 and 63 are pushed up into contact with the upper set of terminals, 65, the motor will turn in the direction to lower the carriage; while if said two disks are lowered into contact with the lower set of terminals,

4 be tested. The operator now puts his foot upon the treadle, 49, which tnrough the nectioni 48,

conai'id arm, 47, rotates the shaft, 6, causing the arm, 50, to move the heflmrank, 52, u ward to the terminal of ew slot, 54, in t e switch stein, 53, and to then push up the said stem againstits "prings bringing the contact disks, 62, 63,

into contact with the upper terminals, 65, 65, which as before stated applies the current to the motor in such manner as to revolve said motor in a direction to cause the can carriage to. descend. As the can carrier descends the rod, 36, descends with it until the cans are submerged and the lower limit of movement reached, when the uppercollar, 37, strikes the arm, 66, on the shaft, 46. Further downward movement rocks this arm, 66, and the shaft 46 with it, lifting by aid of spring 45 the treadle, 49, and reversing the movement of the bell crank, -52. At the same time the reverse movement of the shaft, 46, swings the forked arm, 43, br1nging the strap-brake into action to stop the further rotation of the motor. Reverse movement of the bell crank, 52, causes the pin, 54, to leave the upper limit of the slot, 55,- in the valve-stem and said stem, with its floating contact disks, 1S lowered by the springs until said disks are brought 1nto contact with the lower airs of terminals; 64,164, reversing "the circuit through the motor, and starting it to reyolve in such direction as to Calls the ca ngcarriage to be raised out of the tank atithe same time the movement has released the strap-brake. When the carriage has reached its upper limit of movement the collar, 38, will strike the arm, (36, and swing it far enough to ermit the springs to r cstore the contact dis s to normal or central position shown in Fig. 6. ,And thingsremain thus until the operator again idepresses the foot treadle. Having described, the invention claim is made as follows:

- L; In a can tester, in combination, a tank. adapted, to hold a liquid, 3, can carriage movable into and out'of the tank, electrically ontrolled devices for operating said can carriage, said devices having included therein a reversin switch having three positions, namely, orward, neutral and re-' verse, and means for operating said switch governed by the position of the can carriage.

2. In a can tester, in combination, a tank adapted to contain a liquid, a can carriage movable into and out of said tank, an electric motor adapted to move the can carriage, said motor being provided with electrical circuits having included therein a switch provided with three positions, whereby the motor may be made torotate forwardly, remain stationary or be reversed, said switch being in the form of a balanced stem having two contact members thereonadapted to contact with two sets of oppositely connected terminals.

3. The can tester comprising an up and down moving can-carrier combined with an electric motor and a three position electric switch, a lever connected to the switch by a slotted connection for setting the switch in the down position and an automatic trip device on the moving carrier for reversing the position of the switch at the finish of the downward movement, substantially as specified. I

4. The can tester comprising an up and down moving can-carrier combined with an electric motor and a three position electric switch, a lever connected to the switch by a slotted connection for setting the switch in the down position and an automatic trip de-- vice onthe moving carrier for reversing the position of the switch at the finish of the downward movement,and a second trip device on said carrier for throwing the switch to the neutral position at the finish of the, upward movement, substantially as specified.

5. A can tester including, in combination, a I

tank, a movable can carrier for immersing the cans-in a liquid contained in said tank; a pivotally mounted lever having a' counter balance weight on one end thereof; a pitman pivotally connected tothe opposite end of said lever and to said carriage; and worm and worm gear mechanism for operating said lever and carrier, substantially as specified.

CHARLES DOWNING. I Witnesses? vPFlARL ABRAMS, M. MUNDAY. 

